Austrachelas bergi Haddad, Lyle, Bosselaers & Ramírez, 2009

Mbo, Zingisile, 2017, A new species of the endemic South African spider genus Austrachelas (Araneae: Gallieniellidae) and first description of the male of A. bergi, Zootaxa 4323 (1), pp. 119-124: 120-122

publication ID

https://doi.org/10.11646/zootaxa.4323.1.9

publication LSID

lsid:zoobank.org:pub:74311Fb2-3669-4525-A743-7Dbbaaa29Ddc

persistent identifier

http://treatment.plazi.org/id/EF2487B4-1E2D-F32B-FF2E-FAD96BBBF8FB

treatment provided by

Plazi

scientific name

Austrachelas bergi Haddad, Lyle, Bosselaers & Ramírez, 2009
status

 

Austrachelas bergi Haddad, Lyle, Bosselaers & Ramírez, 2009  ( Figs 4, 5View FIGURES 1 – 5, 8–10View FIGURES 6 – 10)

Austrachelas bergi Haddad, Lyle, Bosselaers & Ramírez, 2009: 17  , figs 1, 52, 53.

Diagnosis. Females of A. bergi  share with A. entabeni  sp. nov. an epigyne with a large tongue-shaped anterior hood, but can be recognized from the latter species by the anterior pentagonal membranous concavity into which the anterior hood is inserted ( Fig. 4View FIGURES 1 – 5), which is absent in the latter species ( Fig. 3View FIGURES 1 – 5). Males of A. bergi  are unique in the genus by the presence of a large proximal apophysis and smaller distal dorsal apophysis on the male palpal tibia, in addition to the distal RTA found in all of the species ( Figs 5View FIGURES 1 – 5, 8–10View FIGURES 6 – 10).

Description. Female. Described by Haddad et al. (2009).

Male. Measurements: CL 3.04, CW 2.20, FL 0.29, SL 1.65, SW 1.30, AL 3.45, AW 2.05, TL 6.50, AME–AME 0.03, AME– ALE 0.01, ALE – ALE 0.22, PME–PME 0.04, PME–PLE 0.07, PLE–PLE 0.38.

Length of leg segments (sequence from femur to tarsus, and total): I 2.15 + 1.10 + 1.55 + 1.22 + 0.83 = 6.85; II 1.90 + 1.07 + 1.43 + 1.08 + 0.80 = 6.28; III 1.65 + 0.88 + 0.95 + 1.26 + 0.73 = 5.47; IV 2.25 + 1.08 + 1.70 + 2.02 + 0.85 = 7.90.

Carapace orange, slightly paler along midline, with series of 10-12 transverse ridges lateral to eye region, stronger anteriorly, progressively shallower posteriorly; AER strongly procurved, laterals larger than medians; AME separated by distance equal to 1/3 their diameter, AME separated from ALE by distance equal to 1/8 AME diameter; clypeus height equal to 6/5 AME diameter at AME, equal to 5/6 ALE diameter at ALE; PERAbout PER straight, laterals larger than medians; PME separated by distance slightly less than 1/2 their diameter, PME separated from PLE by distance equal to 4/5 PME diameter. Chelicerae deep orange-brown, with eight coarse transverse ridges on anterior surface of paturon; promargin with four teeth, proximal tooth smallest, second tooth largest, third and fourth teeth progressively smaller; retromargin without teeth. Sternum and mouthparts bright yellow-brown. Legs all creamy-yellow, leg I with slightly brighter yellow tinge. Leg spination: femora: I pl 1, II pl 1, III pl 2 do 2 rl 1, IV do 2; patellae: spineless; tibiae: I & II spineless, III pl 2 rl 2 plv 2 rlv 2 vt 2, IV pl 1 rl 2 plv 2 rlv 2 vt 2; metatarsi: I & II spineless, strongly scopulate, III & IV scopulate in distal half, III pl 5 rl 5 plv 1 rlv 1 vt 2, IV pl 5 rl 5 plv 2 rlv 1 vt 2; palp: femora do 2. Abdomen pale grey dorsally, with faint mottled creamy-grey chevron, pale grey laterally and ventrally, with grey ring around spinnerets; dorsum and venter lacking scutum or other sclerites, except two pairs of weak dorsal sigilla and small, oval post-epigastric sclerites. Male palpal tibia with proximal and distal retrolateral apophyses, and small triangular dorsal apophysis ( Figs 5View FIGURES 1 – 5, 8–10View FIGURES 6 – 10); proximal retrolateral heel of cymbium strongly pronounced; median tegular apophysis broad, curved and elongate; embolus arc-shaped, with two lobes on inner margin, tip strongly curved ( Figs 5View FIGURES 1 – 5, 8View FIGURES 6 – 10).

Material examined. SOUTH AFRICA: Limpopo: Mariepskop State Forest, Northern Drakensberg , 23°35.06'S, 30°51.81'E, 1350m a.s.l., leg. D. Ubick & S. Prinsloo, 13.X.1999, 1♀ ( CASAbout CAS, CASENT 9072380)GoogleMaps  . Mpumalanga: Songimvelo Nature Reserve, Diepgezet , 25°56'41''S, 31°06'10''E, 1420m a.s.l., leg. D. & S. Ubick, 20–23.III.2001 (pitfalls, ravine with indigenous forest), 1♂ ( CASAbout CAS, CASENT 9072375)GoogleMaps  .

Distribution. Previously known only from the type locality near Nelspruit [Mbombela], this species is recorded from an additional site in Mpumalanga Province near the Swaziland border, as well as from the Limpopo Province for the first time, extending its distribution range to approximately 275 km ( Fig. 11View FIGURE 11).

PER

City Museum

CAS

California Academy of Sciences

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Gallieniellidae

Genus

Austrachelas

Loc

Austrachelas bergi Haddad, Lyle, Bosselaers & Ramírez, 2009

Mbo, Zingisile 2017

2017
Loc

Austrachelas bergi Haddad, Lyle, Bosselaers & Ramírez, 2009 : 17

Haddad 2009: 17